Round solid concrete pile body strain monitoring method based on FBG sensor

Abstract

The invention discloses a round solid concrete pile body strain monitoring method based on an FBG sensor. The method comprises the steps that smoothness processing is conducted on the surface of a round solid concrete pile body; optical fibers are laid in the axial direction of the surface of the processed pile body, and the FBG sensor connected to the optical fibers in series is bonded to the surface of the pile body; the optical fibers laid on the surface of the pile body are coated with epoxy resin; the ends of the optical fibers are connected into an FBG sensor data acquisition instrument; and the strain value of the pile body is measured. The round solid concrete pile body strain monitoring method based on the FBG sensor has the advantages of being simple in construction and wiring, high in success rate, low in cost, high in precision and the like.

Description

technical field [0001] The invention relates to a test method of a foundation structure, in particular to a method for monitoring the strain of a circular solid concrete pile body based on an FBG sensor. Background technique [0002] The circular solid concrete pile is a widely used pile type. It has the advantages of low production cost, simple construction process, low technical difficulty, small diameter, large specific surface area, and high bearing capacity of unilateral concrete. It is widely used in engineering, industrial and civil construction engineering and other fields. At present, electric strain gauges are mostly used to monitor the strain of circular solid concrete piles. Due to the complicated installation and layout of strain gauges and low survival rate, it is difficult to collect continuous data of pile strain. At the same time, if too many strain gauges are buried in the pile body, multiple strain gauge data lines must be derived along the pile body, whi...

AI Technical Summary

Problems solved by technology

At present, electric strain gauges are mostly used to monitor the strain of circular solid concrete piles. Due to the complicated installation and layout of strain gauges and low survival rate, it is difficult to collect continuous data of pile strain.

At the same time, if too many strain gauges are buried in the pile body, multiple strain gauge data lines must be derived along the pile body, which will affect the integrity and strength of the circular solid concrete pile, and there are too many strain gauge connection lines, which are also easy to knot

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